Error :"The method or operation is not implemented." in Settings.settings

Question

I get this error message in VS2013: "The method or operation is not implemented." opening Settings.settings from solution explorer, same issue with properties/settings.. Any Hints?

Solution

Solved, the app.config contained mismatching values from the settings.setting, a restart of VS solved, asking what to do with mismatches.

Comments

[aloisdg]

Also a simple restart fixed it for me on VS2015

[eWilli]

Also belongs to VS2017

[MercifulGiraffe]

For VS2019, I managed to get it open without a restart. All i had to do was open the app.config that had the settings in it, and after that the settings editor would open naturally.

[htm11h]

Project in VS2022 doesnt have an app.config